/Engine/Source/Runtime/Engine/Classes/Engine/TextureStreamingTypes.h
FStreamingRenderAssetPrimitiveInfo ( [UStreamableRenderAsset](API\Runtime\Engine\Engine\UStreamableRenderAsset) * InAsset, const FBoxSphereBounds & InBounds, float InTexelFactor, uint32 InPackedRelativeBox, bool bInAllowInvalidTexelFactorWhenUnregistered, bool bInAffectedByComponentScale )